An inchoative verb, sometimes called an "inceptive" verb, shows a process of beginning or becoming. Productive inchoative affixes exist in several languages, including the suffixes present in Latin and Ancient Greek, and consequently some Romance languages. Not all verbs with inchoative suffixes have retained their inceptive meaning. In Italian, for example, present indicative finisco 'I finish' contains the form of the suffix, while present indicative finiamo 'we finish' does not, yet the only difference in meaning is that of person subject; the suffix is now semantically inert.

In Catalan, the 3rd verb category (verbs ending in ‘-ir’) is divided into 2 sub-categories: ‘pure’ and ‘inchoative’. The vast majority of 3rd category verbs are inchoative and are marked by the addition of the affix ‘-eix-‘, with less than only 15 to 20 of all 3rd category verbs falling into the ‘pure’ sub-category.

Inchoative verbs are affected in only their first, second, third and third person plural conjugations. This can be seen below in the table below comparing the present indicative conjugations of the pure verb ‘dormir’ (to sleep) with the inchoative verb ‘servir’ (to serve):

It is important to note that as nearly all of the 3rd category verbs are inchoative. There is very little, if any, relationship between the inchoative verbs of Catalan and the traditional inceptive meaning and function of inchoative verbs; it is most likely that this verb sub-category is named ‘inchoative’ because the associated morpheme ‘-eix-‘ stems directly from the Latin inchoative morpheme ‘-sc-‘, despite its function and usage having disappeared.

Finnish inchoatives may be marked with -nt- (which undergoes consonant gradation to -nn- in weak form).

vaalentua "to go paler" < vaalea "pale"

hiljentyä "to go silent" < hiljainen "silent"

An alternative form is of this vaaleta, hiljetä, etc.

Not all inchoatives are marked like this, however, e.g.

kuolla "to die"

The translative case marks "becoming something" on the noun. Thus, if a target state is specific, it is placed in the translative case (-ksi), e.g. lehti vaalenee keltaiseksi "the leaf pales to yellow". The transformation from a state is marked with the elative case (-sta). For example, lehti vaalenee tummanvihreästä keltaiseksi "the leaf pales from dark green to yellow". In eastern Karelian dialects the exessive case (-nta) is found; it specifically refers to inchoative changes.

The Germanic languages historically formed inchoative verbs with the suffix -n-. Verbs derived with this suffix belonged to the distinct fourth class of weak verbs in Gothic, while in most other Germanic languages they belonged to the second weak class.

The suffix survives in English as -en, and is still somewhat productive although there are other suffixes such as -ify which compete with it. However, verbs with this suffix are now primarily ergatives, and also have a causative sense ("to cause to become") when used transitively. Some examples:

dark > darken

white > whiten

hard > harden

thick > thicken

Swedish also retains use of the suffix, which is still somewhat productive. Some examples: